RP-HPLC profiles of proteins in control buffalo (A) and cow (B) milks and in the different supernatants of ultracentrifugation obtained from alkalinised milks (C, D: pH 6.7; E, F: pH 9.7 and G, H: pH 10.8 for buffalo and cow milks, respectively). The wavelength for the detection was 214 nm. The quantity of protein injected for milks in A and B was different from those injected for supernatants from C to H.